Bolted Bonnet

L&T Valves manufactures a wide variety of Gate, Globe & Check Valves in bolted-bonnet design.

The valves are approved by the global majors in oil & gas and power and have a reputation for reliable performance in critical services, across the globe.

Valves in bolted bonnet construction are available in pressure classes from 150 to 2500, in a variety of materials and end-connections.

Gate Valves

API 600/ISO 10434
2" to 72"
ASME class 150 to 2500

Salient Features :

Body and bonnet - Cast with uniform sections, precision machined.
Body : Straight through port without recesses except in the seat area - Minimum resistance to flow, turbulence and erosion.
Flex wedge: Guide slots in the wedge engage with integral guide ribs in the body, Stem-to-wedge contact close to wedge centre - Better sealing, smoother operation.
Seal-welded seat ring - Eliminates leakage path between seat ring and body, does not loosen up due to temperature fluctuations or vibration.
Stem - One-piece construction with forged T-head - Long service life, smoother operation.

Globe Valves

BS 1873
2" to 24"
ASME 150 to 2500

Salient Features :

Body and Bonnet - Cast with uniform sections, precision machined.
In-situ hard-faced body seat - Eliminates leakage path between seat ring and body.
Guided plug-type disc, Free-floating stem-disc connection - Uniform seating.

Check Valves

BS 1868
2" to 36"
ASME 150 to 2500

Salient Features:

Body and Bonnet - Cast with uniform sections, precision machined.
Body : Permits full swing of disc on downstream side - Lower flow resistance and disc erosion.
Disc : Internally-hinged - No opening on the body, higher integrity.
Disc secured to hinge using lock nut and pin.
Disc free to rotate to avoid localized wear.